I bought this calculator on the basis of good review here.
True, most of the good things mentioned in reviews here are indeed true but I found out one major flaw in the "algebra mode"
for this calculator.
In the past, I have avoided HP calculators becuase HP insists on RPN. So I was happy to have an HP calculator with both algebra and RPN until I found out about "Algebra mode" in this calculator.
In other algebra calculators, it is clear that the following is true:
3 + 4 * 5 = 23
But HP 18 gives me the following result:
3 + 4 * 5 = 35
In other words, it is not algebra, in the sense that is taught in the school.
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